﻿#region License

// Dimebrain TweetSharp
// (www.dimebrain.com)
// 
// The MIT License
// 
// Copyright (c) 2009 Dimebrain
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// 

#endregion

using System;
using System.Security.Cryptography;
using Dimebrain.TweetSharp.Core.OAuth;

namespace Dimebrain.TweetSharp.Core.Extensions
{
    public static class OAuthExtensions
    {
        public static string ToRequestValue(this OAuthSignatureMethod signatureMethod)
        {
            var value = signatureMethod.ToString().ToUpper();
            var shaIndex = value.IndexOf("SHA1");
            return shaIndex > -1 ? value.Insert(shaIndex, "-") : value;
        }

        public static string HashWith(this string input, HashAlgorithm algorithm)
        {
            var data = System.Text.Encoding
#if !SILVERLIGHT
                .ASCII
#else
                .UTF8
#endif
                .GetBytes(input);
            var hash = algorithm.ComputeHash(data);
            return Convert.ToBase64String(hash);
        }
    }
}